Comparative Analysis of the Lighting Engineering Characteristics of an Indoor LED Luminaire with different Microprism Lenses

Measurement results and analysis of photometric characteristics and efficacy of indoor LED luminaire, constructed with multi-variate of the optical system - without and with different microprism lens samples, are presented in this paper. By using a goniophotometer the results for the measured light distribution, luminous intensity, beam angle, average luminance at vertical angular zones, output luminous flux and total luminous efficacy for the different microprism lenses samples of the indoor LED luminaire are presented. The efficiency loss in the optical system with different microprism lenses is shown. Comparative lighting calculations of the study indoor LED luminaire without and with different microprism lenses are done.